Measuring a Cherenkov ring in the radio emission from air showers at 110-190 MHz with LOFAR

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dc.contributor.authorNelles, A.
dc.contributor.authorSchellart, P.
dc.contributor.authorBuitink, S.
dc.contributor.authorCorstanje, A.
dc.contributor.authorde Vries, K. D.
dc.contributor.authorEnriquez, J. E.
dc.contributor.authorFalcke, H.
dc.contributor.authorFrieswijk, W.
dc.contributor.authorHörandel, J. R.
dc.contributor.authorScholten, O.
dc.contributor.authorter Veen, S.
dc.contributor.authorThoudam, S.
dc.contributor.authorvan den Akker, M.
dc.contributor.authorAnderson, J.
dc.contributor.authorAsgekar, A.
dc.contributor.authorBell, M. E.
dc.contributor.authorBentum, M. J.
dc.contributor.authorBernardi, G.
dc.contributor.authorBest, P.
dc.contributor.authorBregman, J.
dc.contributor.authorBreitling, F.
dc.contributor.authorBroderick, J.
dc.contributor.authorBrouw, W. N.
dc.contributor.authorBrüggen, M.
dc.contributor.authorButcher, H. R.
dc.contributor.authorCiardi, B
dc.contributor.authorDeller, A
dc.contributor.authorDuscha, S
dc.contributor.authorEislöffel, J
dc.contributor.authorFallows, R. A
dc.contributor.authorGarrett, M. A
dc.contributor.authorGunst, A W
dc.contributor.authorHassall, T. E
dc.contributor.authorHeald, G
dc.contributor.authorHorneffer, A
dc.contributor.authorIacobelli, M
dc.contributor.authorJuette, E
dc.contributor.authorKarastergiou, A
dc.contributor.authorKondratiev, V. I
dc.contributor.authorKramer, M
dc.contributor.authorKuniyoshi, M
dc.contributor.authorKuper, G.
dc.contributor.authorMaat, P.
dc.contributor.authorMann, G.
dc.contributor.authorMevius, M.
dc.contributor.authorNorden, M. J.
dc.contributor.authorPaas, H.
dc.contributor.authorPandey-Pommier, M.
dc.contributor.authorPietka, G.
dc.contributor.authorPizzo, R.
dc.contributor.authorPolatidis, A. G.
dc.contributor.authorReich, W.
dc.contributor.authorRöttgering, H.
dc.contributor.authorScaife, A. M. M.
dc.contributor.authorSchwarz, D.
dc.contributor.authorSmirnov, O.
dc.contributor.authorStapper, B. W.
dc.contributor.authorSteinmetz, M.
dc.contributor.authorStewart, A.
dc.contributor.authorTagger, M.
dc.contributor.authorTang, Y.
dc.contributor.authorTasse, C.
dc.contributor.authorVermeulen, R.
dc.contributor.authorVocks, C.
dc.contributor.authorvan Weeren, R. J.
dc.contributor.authorWijnholds, S. J.
dc.contributor.authorWucknitz, O.
dc.contributor.authorYatawatta, S.
dc.contributor.authorZarka, P.
dc.date.accessioned2015-06-11T04:00:24Z
dc.date.available2015-06-11T04:00:24Z
dc.date.issued2015-05
dc.date.updated2015-12-11T09:24:08Z
dc.description.abstractMeasuring radio emission from air showers offers a novel way to determine properties of the primary cosmic rays such as their mass and energy. Theory predicts that relativistic time compression effects lead to a ring of amplified emission which starts to dominate the emission pattern for frequencies above ~100 MHz. In this article we present the first detailed measurements of this structure. Ring structures in the radio emission of air showers are measured with the LOFAR radio telescope in the frequency range of 110 - 190 MHz. These data are well described by CoREAS simulations. They clearly confirm the importance of including the index of refraction of air as a function of height. Furthermore, the presence of the Cherenkov ring offers the possibility for a geometrical measurement of the depth of shower maximum, which in turn depends on the mass of the primary particle.
dc.description.sponsorshipWe acknowledge financial support from the Netherlands Research School for Astronomy (NOVA), the Samenwerkingsverband Noord-Nederland (SNN), the Foundation for Fundamental Research on Matter (FOM) and the Netherlands Organization for Scientific Research (NWO), VENI Grant 639-041-130. We acknowledge funding from an Advanced Grant of the European Research Council under the European Union’s Seventh Framework Program (FP/2007-2013)/ERC Grant Agreement no. 227610.en_AU
dc.identifier.issn0927-6505en_AU
dc.identifier.urihttp://hdl.handle.net/1885/13859
dc.publisherElsevier
dc.rights© 2014 Elsevier B.V.
dc.sourceAstroparticle Physics
dc.subjectCosmic rays
dc.subjectExtensive air showers
dc.subjectRadio emission
dc.subjectLOFAR
dc.subjectTime-compression
dc.titleMeasuring a Cherenkov ring in the radio emission from air showers at 110-190 MHz with LOFAR
dc.typeJournal article
local.bibliographicCitation.lastpage21en_AU
local.bibliographicCitation.startpage11en_AU
local.contributor.affiliationButcher, H. R., Research School of Astronomy and Astrophysics, The Australian National Universityen_AU
local.contributor.authoruidU4478121en_AU
local.identifier.absfor020100 - ASTRONOMICAL AND SPACE SCIENCES
local.identifier.ariespublicationU3488905xPUB5129
local.identifier.citationvolume65en_AU
local.identifier.doi10.1016/j.astropartphys.2014.11.006en_AU
local.identifier.scopusID2-s2.0-84919725521
local.publisher.urlhttp://www.elsevier.com/en_AU
local.type.statusPublished Versionen_AU

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